gameoflife.py

from os import system, name 
from time import sleep 
  
def clear(): 
    if name == 'nt': 
        _ = system('cls') 
    else: 
        _ = system('clear') 

def gol(width,oldboard):
    # Takes a list of boolean values and the width of the board
    # Return the next step 
    # Any live cell with fewer than two live neighbors dies (referred to as underpopulation or exposure).
    # Any live cell with more than three live neighbors dies (referred to as overpopulation or overcrowding).
    # Any live cell with two or three live neighbors lives, unchanged, to the next generation.
    # Any dead cell with exactly three live neighbors will come to life.
    # http://www.conwaylife.com/wiki/Conway%27s_Game_of_Life

    newboard = []
    field = len(oldboard)
    for cell in range(field):

        cell += field
        cell += width

        e  = ((cell+1) % width) + (width *  (cell // width))    % field - width 
        se = ((cell+1) % width) + (width * ((cell // width)+1)) % field - width 
        s  = ((cell)   % width) + (width * ((cell // width)+1)) % field - width 
        sw = ((cell-1) % width) + (width * ((cell // width)+1)) % field - width 
        w  = ((cell-1) % width) + (width *  (cell // width))    % field - width 
        nw = ((cell-1) % width) + (width * ((cell // width)-1)) % field - width 
        n  = ((cell)   % width) + (width * ((cell // width)-1)) % field - width 
        ne = ((cell+1) % width) + (width * ((cell // width)-1)) % field - width 

        neighbors = [oldboard[e],oldboard[se],oldboard[s],oldboard[sw],oldboard[w],oldboard[nw],oldboard[n],oldboard[ne]]

        count = 0
        for neighbor in neighbors:
            if neighbor == True:
                count += 1
        if count == 2:
            newboard.append(oldboard[cell-field-width])
        elif count == 3:
            newboard.append(True)
        else:
            newboard.append(False)
    return newboard

def displayboard(width,board):
    clear()
    screen = ''
    newline = 0
    for cell in board:
        if cell == True:
            screen += 'X'
        else:
            screen += ' '
        newline += 1
        if newline == width:
            screen += '\n'
            newline     = 0
    print(screen)
    sleep(.05)

def main():
    board = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
    width  = 10
    while True:
        displayboard(width,board)
        board = gol(width,board)

main()